;(function (window,undefined) {

    function init(el) {
        let els = document.querySelectorAll(el)
        for (let i = 0;i < els.length;i++) {
            this[i] = els[i]
        }
        this.length = els.length
    }

    let jQuery = function (el) {
        return new init(el)
    }

    jQuery.extends = function(object) {
        for (let key in object) {
            init.prototype[key] = object[key]
        }
    }
    init.prototype = {
        css(cssAttr,cssVal) {
            for (let i = 0;i < this.length;i++) {
                this[i].style[cssAttr] = cssVal
            }
            return this
        },
        ajax(options) {},
        attr(options) {},
        addClass(options) {}
    }
    window.jQuery=window.$=jQuery
})(window)
